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Enable USB precision touchpad support #48

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merged 3 commits into from
Feb 3, 2022
Merged

Enable USB precision touchpad support #48

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f4c269f
WIP usb touchpad support
Kethen Jan 26, 2021
12450b2
remove comment regarding setValue not working
Kethen Mar 1, 2021
78cfff0
remove VoodooI2CPrecisionTouchpadFeatureReport class
Kethen Dec 17, 2021
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5 changes: 0 additions & 5 deletions VoodooI2CHID/Info.plist
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Original file line number Diff line number Diff line change
Expand Up @@ -95,11 +95,6 @@
</array>
<key>IOMatchCategory</key>
<string>VoodooI2CHIDMultitouch</string>
<key>IOPropertyMatch</key>
<dict>
<key>Transport</key>
<string>I2C</string>
</dict>
<key>IOProbeScore</key>
<integer>300</integer>
<key>IOClass</key>
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13 changes: 1 addition & 12 deletions VoodooI2CHID/VoodooI2CPrecisionTouchpadHIDEventDriver.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -12,18 +12,7 @@
OSDefineMetaClassAndStructors(VoodooI2CPrecisionTouchpadHIDEventDriver, VoodooI2CMultitouchHIDEventDriver);

void VoodooI2CPrecisionTouchpadHIDEventDriver::enterPrecisionTouchpadMode() {
// We should really do this using `input_mode_element->setValue(INPUT_MODE_TOUCHPAD)`
// but I am not able to get it to work.

VoodooI2CPrecisionTouchpadFeatureReport buffer;
buffer.value = INPUT_MODE_TOUCHPAD;
buffer.reserved = 0x00;

IOBufferMemoryDescriptor* report = IOBufferMemoryDescriptor::inTaskWithOptions(kernel_task, 0, sizeof(VoodooI2CPrecisionTouchpadFeatureReport));
report->writeBytes(0, &buffer, sizeof(VoodooI2CPrecisionTouchpadFeatureReport));

hid_interface->setReport(report, kIOHIDReportTypeFeature, digitiser.input_mode->getReportID());
report->release();
digitiser.input_mode->setValue(INPUT_MODE_TOUCHPAD);

ready = true;
}
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5 changes: 0 additions & 5 deletions VoodooI2CHID/VoodooI2CPrecisionTouchpadHIDEventDriver.hpp
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Expand Up @@ -23,11 +23,6 @@
#define INPUT_MODE_MOUSE 0x00
#define INPUT_MODE_TOUCHPAD 0x03

typedef struct __attribute__((__packed__)) {
UInt8 value;
UInt8 reserved;
} VoodooI2CPrecisionTouchpadFeatureReport;

/* Implements an HID Event Driver for Precision Touchpad devices as specified by Microsoft's protocol in the following document: https://docs.microsoft.com/en-us/windows-hardware/design/component-guidelines/precision-touchpad-devices
*
* The members of this class are responsible for instructing a Precision Touchpad device to enter Touchpad mode.
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